Which of the following best describes the theme of the passage? a. The agricultural revolution changed human food preferences.
b. Some plants today are similar to their ancestors.
c. Farming replaced hunting and gathering.
d. Agricultural communities developed from hunter-gatherer
communities, and the practice of agriculture introduced new
environmental problems.

d. it adversely affected american productivity

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b

a phrase from a poem by ralph waldo emerson about the battle of lexington and concord. emerson's words read, “here once the embattled farmers stood / and fired the shot heard round the world.”

the answer i chose to believe is 'harmony'